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    <title>Document</title>
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    <a href="./demo/2001252018.html" target="_blank">vh</a>可视高度<br>
    <a href="./demo/2001252024.html" target="_blank">color</a>颜色<br>
    <a href="./demo/2001261641.html" target="_blank" >linear-gradient(direction, color-stop1, color-stop2, ...)</a>线性渐变<br>
    <a >turn</a>圈，旋转<br>
    <a >translate()</a>变形移动，移动后动画伸缩变为两头伸缩<br>
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